foo.cc: In function 'int gensokyo::morisa()':
foo.cc:25:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&T);
   ~~~~~^~~~~~~~~
foo.cc:29:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&N);
    ~~~~~^~~~~~~~~
foo.cc:30:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    for(int i=1;i<=N;i++) scanf("%llu",&a[i]);
                          ~~~~~^~~~~~~~~~~~~~

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